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A034789 Related to sextic factorial numbers A008542. 1
1, 21, 546, 15561, 466830, 14471730, 458960580, 14801478705, 483514971030, 15955994043990, 530899438190940, 17785131179396490, 599222112044281740, 20287948650642110340, 689790254121831751560, 23539092421907508521985 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

Convolution of A004993(n-1) with A025751(n), n >= 1.

FORMULA

a(n) = 6^(n-1)*A008542(n)/n!, A008542(n)=(6*n-5)(!^6) := product(6*j-5, j=1..n); G.f. (-1+(1-36*x)^(-1/6))/6.

CROSSREFS

Cf. A008542, A034687.

Sequence in context: A095655 A080483 A015255 * A194022 A183730 A199254

Adjacent sequences:  A034786 A034787 A034788 * A034790 A034791 A034792

KEYWORD

easy,nonn

AUTHOR

Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.